How can I highlight a cell when user mouses over?
You need to handle client-side events of WebGrid to accomplish this.
Rumen wrote on this topic in the following thread:http://forums.infragistics.com/forums/t/2956.aspx
Another person had some additional details on this thread, related to this approach interacting with alternate row styles:http://forums.infragistics.com/forums/t/17808.aspx